KVM/QEMU virtual machine problem after upgrading to Ubuntu 24

On Ubuntu 22 I created a Windows virtual machine on KVM/QEMU using the Virtual Machine Manager.

After upgrading to Ubuntu 24 I cannot run this machine any more. It says "shutoff" and when I try to run it (using the "play" button) I get the error message

Error starting domain:unsupported configuration:domain configuration does not support video model 'qxl'

When I open the VM I have the configuration items on the left (Overview, OS information, etc.) and there is an item "Video QXL" as well. On the right I can choose a value for the parameter "Model" with values "Bochs", "None", "QXL", "Ramfb", "VGA", and "Virtio".

Changing to another option and choosing "Apply" results in another error:

Error changing VM configuration:unsupported configuration:chardev 'spicevmc' not supported without spice graphics

I had spice graphics installed in 22, does anyone know that the package name has changed? Is there a way to change the configuration so that I can run the existing VM?

(When I right-click on "Video QXL" item, I can choose to Add Hardware, but I cannot delete the "Video QXL" item itself -- that would have been the easiest I thought)